2 //===------------------------- streambuf ----------------------------------===//
4 // The LLVM Compiler Infrastructure
6 // This file is dual licensed under the MIT and the University of Illinois Open
7 // Source Licenses. See LICENSE.TXT for details.
9 //===----------------------------------------------------------------------===//
11 #ifndef _LIBCPP_STEAMBUF
12 #define _LIBCPP_STEAMBUF
20 template <class charT, class traits = char_traits<charT> >
25 typedef charT char_type;
26 typedef traits traits_type;
27 typedef typename traits_type::int_type int_type;
28 typedef typename traits_type::pos_type pos_type;
29 typedef typename traits_type::off_type off_type;
31 virtual ~basic_streambuf();
33 // 27.6.2.2.1 locales:
34 locale pubimbue(const locale& loc);
35 locale getloc() const;
37 // 27.6.2.2.2 buffer and positioning:
38 basic_streambuf* pubsetbuf(char_type* s, streamsize n);
39 pos_type pubseekoff(off_type off, ios_base::seekdir way,
40 ios_base::openmode which = ios_base::in | ios_base::out);
41 pos_type pubseekpos(pos_type sp,
42 ios_base::openmode which = ios_base::in | ios_base::out);
46 // 27.6.2.2.3 Get area:
47 streamsize in_avail();
51 streamsize sgetn(char_type* s, streamsize n);
53 // 27.6.2.2.4 Putback:
54 int_type sputbackc(char_type c);
57 // 27.6.2.2.5 Put area:
58 int_type sputc(char_type c);
59 streamsize sputn(const char_type* s, streamsize n);
63 basic_streambuf(const basic_streambuf& rhs);
64 basic_streambuf& operator=(const basic_streambuf& rhs);
65 void swap(basic_streambuf& rhs);
67 // 27.6.2.3.2 Get area:
68 char_type* eback() const;
69 char_type* gptr() const;
70 char_type* egptr() const;
72 void setg(char_type* gbeg, char_type* gnext, char_type* gend);
74 // 27.6.2.3.3 Put area:
75 char_type* pbase() const;
76 char_type* pptr() const;
77 char_type* epptr() const;
79 void setp(char_type* pbeg, char_type* pend);
81 // 27.6.2.4 virtual functions:
82 // 27.6.2.4.1 Locales:
83 virtual void imbue(const locale& loc);
85 // 27.6.2.4.2 Buffer management and positioning:
86 virtual basic_streambuf* setbuf(char_type* s, streamsize n);
87 virtual pos_type seekoff(off_type off, ios_base::seekdir way,
88 ios_base::openmode which = ios_base::in | ios_base::out);
89 virtual pos_type seekpos(pos_type sp,
90 ios_base::openmode which = ios_base::in | ios_base::out);
93 // 27.6.2.4.3 Get area:
94 virtual streamsize showmanyc();
95 virtual streamsize xsgetn(char_type* s, streamsize n);
96 virtual int_type underflow();
97 virtual int_type uflow();
99 // 27.6.2.4.4 Putback:
100 virtual int_type pbackfail(int_type c = traits_type::eof());
102 // 27.6.2.4.5 Put area:
103 virtual streamsize xsputn(const char_type* s, streamsize n);
104 virtual int_type overflow (int_type c = traits_type::eof());
115 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
116 #pragma GCC system_header
119 _LIBCPP_BEGIN_NAMESPACE_STD
121 template <class _CharT, class _Traits>
122 class _LIBCPP_TEMPLATE_VIS basic_streambuf
126 typedef _CharT char_type;
127 typedef _Traits traits_type;
128 typedef typename traits_type::int_type int_type;
129 typedef typename traits_type::pos_type pos_type;
130 typedef typename traits_type::off_type off_type;
132 virtual ~basic_streambuf();
134 // 27.6.2.2.1 locales:
135 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
136 locale pubimbue(const locale& __loc) {
143 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
144 locale getloc() const { return __loc_; }
146 // 27.6.2.2.2 buffer and positioning:
147 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
148 basic_streambuf* pubsetbuf(char_type* __s, streamsize __n)
149 { return setbuf(__s, __n); }
151 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
152 pos_type pubseekoff(off_type __off, ios_base::seekdir __way,
153 ios_base::openmode __which = ios_base::in | ios_base::out)
154 { return seekoff(__off, __way, __which); }
156 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
157 pos_type pubseekpos(pos_type __sp,
158 ios_base::openmode __which = ios_base::in | ios_base::out)
159 { return seekpos(__sp, __which); }
161 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
162 int pubsync() { return sync(); }
164 // Get and put areas:
165 // 27.6.2.2.3 Get area:
166 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
167 streamsize in_avail() {
168 if (__ninp_ < __einp_)
169 return static_cast<streamsize>(__einp_ - __ninp_);
173 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
175 if (sbumpc() == traits_type::eof())
176 return traits_type::eof();
180 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
182 if (__ninp_ == __einp_)
184 return traits_type::to_int_type(*__ninp_++);
187 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
189 if (__ninp_ == __einp_)
191 return traits_type::to_int_type(*__ninp_);
194 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
195 streamsize sgetn(char_type* __s, streamsize __n)
196 { return xsgetn(__s, __n); }
198 // 27.6.2.2.4 Putback:
199 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
200 int_type sputbackc(char_type __c) {
201 if (__binp_ == __ninp_ || !traits_type::eq(__c, __ninp_[-1]))
202 return pbackfail(traits_type::to_int_type(__c));
203 return traits_type::to_int_type(*--__ninp_);
206 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
208 if (__binp_ == __ninp_)
210 return traits_type::to_int_type(*--__ninp_);
213 // 27.6.2.2.5 Put area:
214 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
215 int_type sputc(char_type __c) {
216 if (__nout_ == __eout_)
217 return overflow(traits_type::to_int_type(__c));
219 return traits_type::to_int_type(__c);
222 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
223 streamsize sputn(const char_type* __s, streamsize __n)
224 { return xsputn(__s, __n); }
228 basic_streambuf(const basic_streambuf& __rhs);
229 basic_streambuf& operator=(const basic_streambuf& __rhs);
230 void swap(basic_streambuf& __rhs);
232 // 27.6.2.3.2 Get area:
233 _LIBCPP_ALWAYS_INLINE char_type* eback() const {return __binp_;}
234 _LIBCPP_ALWAYS_INLINE char_type* gptr() const {return __ninp_;}
235 _LIBCPP_ALWAYS_INLINE char_type* egptr() const {return __einp_;}
237 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
238 void gbump(int __n) { __ninp_ += __n; }
240 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
241 void setg(char_type* __gbeg, char_type* __gnext, char_type* __gend) {
247 // 27.6.2.3.3 Put area:
248 _LIBCPP_ALWAYS_INLINE char_type* pbase() const {return __bout_;}
249 _LIBCPP_ALWAYS_INLINE char_type* pptr() const {return __nout_;}
250 _LIBCPP_ALWAYS_INLINE char_type* epptr() const {return __eout_;}
252 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
253 void pbump(int __n) { __nout_ += __n; }
255 inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
256 void setp(char_type* __pbeg, char_type* __pend) {
257 __bout_ = __nout_ = __pbeg;
261 // 27.6.2.4 virtual functions:
262 // 27.6.2.4.1 Locales:
263 virtual void imbue(const locale& __loc);
265 // 27.6.2.4.2 Buffer management and positioning:
266 virtual basic_streambuf* setbuf(char_type* __s, streamsize __n);
267 virtual pos_type seekoff(off_type __off, ios_base::seekdir __way,
268 ios_base::openmode __which = ios_base::in | ios_base::out);
269 virtual pos_type seekpos(pos_type __sp,
270 ios_base::openmode __which = ios_base::in | ios_base::out);
273 // 27.6.2.4.3 Get area:
274 virtual streamsize showmanyc();
275 virtual streamsize xsgetn(char_type* __s, streamsize __n);
276 virtual int_type underflow();
277 virtual int_type uflow();
279 // 27.6.2.4.4 Putback:
280 virtual int_type pbackfail(int_type __c = traits_type::eof());
282 // 27.6.2.4.5 Put area:
283 virtual streamsize xsputn(const char_type* __s, streamsize __n);
284 virtual int_type overflow(int_type __c = traits_type::eof());
296 template <class _CharT, class _Traits>
297 basic_streambuf<_CharT, _Traits>::~basic_streambuf()
301 template <class _CharT, class _Traits>
302 basic_streambuf<_CharT, _Traits>::basic_streambuf()
312 template <class _CharT, class _Traits>
313 basic_streambuf<_CharT, _Traits>::basic_streambuf(const basic_streambuf& __sb)
314 : __loc_(__sb.__loc_),
315 __binp_(__sb.__binp_),
316 __ninp_(__sb.__ninp_),
317 __einp_(__sb.__einp_),
318 __bout_(__sb.__bout_),
319 __nout_(__sb.__nout_),
320 __eout_(__sb.__eout_)
324 template <class _CharT, class _Traits>
325 basic_streambuf<_CharT, _Traits>&
326 basic_streambuf<_CharT, _Traits>::operator=(const basic_streambuf& __sb)
328 __loc_ = __sb.__loc_;
329 __binp_ = __sb.__binp_;
330 __ninp_ = __sb.__ninp_;
331 __einp_ = __sb.__einp_;
332 __bout_ = __sb.__bout_;
333 __nout_ = __sb.__nout_;
334 __eout_ = __sb.__eout_;
338 template <class _CharT, class _Traits>
340 basic_streambuf<_CharT, _Traits>::swap(basic_streambuf& __sb)
342 _VSTD::swap(__loc_, __sb.__loc_);
343 _VSTD::swap(__binp_, __sb.__binp_);
344 _VSTD::swap(__ninp_, __sb.__ninp_);
345 _VSTD::swap(__einp_, __sb.__einp_);
346 _VSTD::swap(__bout_, __sb.__bout_);
347 _VSTD::swap(__nout_, __sb.__nout_);
348 _VSTD::swap(__eout_, __sb.__eout_);
351 template <class _CharT, class _Traits>
353 basic_streambuf<_CharT, _Traits>::imbue(const locale&)
357 template <class _CharT, class _Traits>
358 basic_streambuf<_CharT, _Traits>*
359 basic_streambuf<_CharT, _Traits>::setbuf(char_type*, streamsize)
364 template <class _CharT, class _Traits>
365 typename basic_streambuf<_CharT, _Traits>::pos_type
366 basic_streambuf<_CharT, _Traits>::seekoff(off_type, ios_base::seekdir,
369 return pos_type(off_type(-1));
372 template <class _CharT, class _Traits>
373 typename basic_streambuf<_CharT, _Traits>::pos_type
374 basic_streambuf<_CharT, _Traits>::seekpos(pos_type, ios_base::openmode)
376 return pos_type(off_type(-1));
379 template <class _CharT, class _Traits>
381 basic_streambuf<_CharT, _Traits>::sync()
386 template <class _CharT, class _Traits>
388 basic_streambuf<_CharT, _Traits>::showmanyc()
393 template <class _CharT, class _Traits>
395 basic_streambuf<_CharT, _Traits>::xsgetn(char_type* __s, streamsize __n)
397 const int_type __eof = traits_type::eof();
402 if (__ninp_ < __einp_)
404 const streamsize __len = _VSTD::min(__einp_ - __ninp_, __n - __i);
405 traits_type::copy(__s, __ninp_, __len);
410 else if ((__c = uflow()) != __eof)
412 *__s = traits_type::to_char_type(__c);
422 template <class _CharT, class _Traits>
423 typename basic_streambuf<_CharT, _Traits>::int_type
424 basic_streambuf<_CharT, _Traits>::underflow()
426 return traits_type::eof();
429 template <class _CharT, class _Traits>
430 typename basic_streambuf<_CharT, _Traits>::int_type
431 basic_streambuf<_CharT, _Traits>::uflow()
433 if (underflow() == traits_type::eof())
434 return traits_type::eof();
435 return traits_type::to_int_type(*__ninp_++);
438 template <class _CharT, class _Traits>
439 typename basic_streambuf<_CharT, _Traits>::int_type
440 basic_streambuf<_CharT, _Traits>::pbackfail(int_type)
442 return traits_type::eof();
445 template <class _CharT, class _Traits>
447 basic_streambuf<_CharT, _Traits>::xsputn(const char_type* __s, streamsize __n)
450 int_type __eof = traits_type::eof();
453 if (__nout_ >= __eout_)
455 if (overflow(traits_type::to_int_type(*__s)) == __eof)
462 streamsize __chunk_size = _VSTD::min(__eout_ - __nout_, __n - __i);
463 traits_type::copy(__nout_, __s, __chunk_size);
464 __nout_ += __chunk_size;
472 template <class _CharT, class _Traits>
473 typename basic_streambuf<_CharT, _Traits>::int_type
474 basic_streambuf<_CharT, _Traits>::overflow(int_type)
476 return traits_type::eof();
479 _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_streambuf<char>)
480 _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_streambuf<wchar_t>)
482 _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ios<char>)
483 _LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ios<wchar_t>)
485 _LIBCPP_END_NAMESPACE_STD
487 #endif // _LIBCPP_STEAMBUF